#1B4DA0#1B4DA0

#1B4DA0 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 43.7% C 0.145 H 260.1°. Best body text is #FFFFFF at 8.03:1 contrast (WCAG AA passes).

Color values

HEX	#1B4DA0
RGB	rgb(27, 77, 160)
HSL	hsl(217, 71%, 37%)
HSV	hsv(217, 83%, 63%)
CMYK	cmyk(83.1%, 51.9%, 0%, 37.3%)
CIE-LAB	lab(34.14, 15.48, -49.64)
CIE-LCH	lch(34.14, 52.00, 287.32°)
OKLab	oklab(43.74% -0.0248 -0.143)
OKLCH	oklch(43.74% 0.145 260.1)
XYZ	xyz(9.4487, 8.0777, 34.3120)
Luminance	0.0808 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4DA0 #A06E1B

analogous

#1B90A0 #1B4DA0 #2C1BA0

triadic

#1B4DA0 #A01B4D #4DA01B

tetradic

#1B4DA0 #A01B90 #A06E1B #1BA02C

square

#1B4DA0 #A01B90 #A06E1B #1BA02C

split-complementary

#1B4DA0 #A02C1B #90A01B

monochromatic

#091B37 #12346C #1B4DA0 #2466D4 #5389E2

Accessibility & contrast

On white

8.03

#1B4DA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#1B4DA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4DA0

8.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4DA0	#FFFFFF	#000000	##FFFFFF
##1B4DA0	1.00	8.03	2.62	8.03
#FFFFFF	8.03	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1657A3

Deuteranopia (green-blind)

#004B9E

Tritanopia (blue-blind)

#00616F

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1b4da0;
/* rgb */ color: rgb(27, 77, 160);
/* oklch */ color: oklch(43.7% 0.145 260.1);

Tailwind

colors: {
  custom: {
    50: '#6f7ebd',
    500: '#1b4da0',
    950: '#000000',
  },
}

SCSS

$custom: #1b4da0;
$custom-light: #6f7ebd;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4da0",
  "rgb": {
    "r": 27,
    "g": 77,
    "b": 160
  },
  "hsl": {
    "h": 217.444,
    "s": 71.123,
    "l": 36.667
  },
  "oklch": {
    "l": 0.43737,
    "c": 0.14517,
    "h": 260.1
  },
  "luminance": 0.08079
}

Semantic roles & 50–950 ramp

primary

#1B4DA0

secondary

#C59A52

accent

#AA3AEE

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1B4DA0

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →